Formulas Flashcards
Motion Equations
Vf= Vo + at X= xo + vot + 1/2at^2 v^2= vo^2 + 2aX
Force or Natural Force
ma, mg
Force of Friction (Ff)
ukFn
Centripetal Acceleration and Force
Ac= v^2/r
FAc=mv^2/r
Torque
= Fsin(ø)
Momentum
p=mv
Impulse
J= F∆t= ∆p
Kinetic Energy
1/2mv^2
Gravitational Potential Energy
U or PEg= mgh
Work
w= Fdcosø
Power
W/∆t
Spring Force
-kx
Potential Spring Energy
1/2kx^2
Period of Spring
2π √m/k
Period of Pendulum
2π √l/g
Period
1/f (frequency)
Force/Potential Energy of Universal Gravitation
-GM1m2/ r^2
Force (Electricity)
kq1q2/ r^2
Electric Field
F/q
Potential Electric Energy
qV = kq1q2/ r
Average Electrical Field
- v/d
Voltage in Series
k ( q1/r1 + q2/r2 + …..)
Capacitance
Q/V or vacuum permititivity x A/d
Potential Capacitance
1/2QV= 1/2CV^2
Current
∆Q / T
Resistance
p (resistivity) x length / A (area)
Electric Potential/ Potential Difference (V)
V= IR
Power (electricity)
IV
Capacitance (in series and parallel circuit)
Cp= c1 + c2 + c3 ….
1/Cs= 1/c1 + 1/c2 + 1/c3 …
Force of Magnetic Field ( 2 ways)
Fb= qvBsin ø Fb= BI (length) sin ø
Magnetic Field
magnetic constant/2π x I/r
Magnetic Flux
BAcosø
Avg. Emf
change in magnetic flux / time
or B x length x v
Density (fluid)
m/V
Pressure (liquid)
density (p) x gh
Force of Buoyancy
density x Vg
Rate of Heat Transfer
KE x Area x temp/ L (thicknesss)
Pressure
F/ A
Pressure x Volume (PV)
=nRT= NkbT
Average Molecular KE
= 3/2 Kb T
Work done on a System
-P∆V
Internal Energy
∆U= Q + W
Efficiency
e= W/ Qh
Atomic Energy
E= hf= pc
Kinetic Energy Max (Atomic)
KEmax= hf- ø (work function)
ø= Hft (ft= frequency threshold)
Brog. Wavelength
Wavelnght= h / p (momentum)
Energy (Atomic)
E= mc^2
Speed of Wave
v= f wavelength
Index of Refraction + Conservation
n= c/ v
n1sinø1 = n2sinø2
Critical Angle
sinøc= n2/n1
Focal Length Equation
1/ image distance + 1/object distance= 1/focal length
Magnification
-Image distance/ object distance or final/ intial height
dsinø = m x wavelength
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